Conformation of protected amino acids. V. Application of lanthanide-shift reagents for conformational studies of tert-butoxycarbonyl .alpha.-amino acid esters: equilibrium changes and kinetics of the isomerization

1976 ◽  
Vol 98 (19) ◽  
pp. 5969-5973 ◽  
Author(s):  
Horst Kessler ◽  
Michael Molter
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Amino Acid Esters ◽  
Conformational Studies ◽  
Lanthanide Shift Reagents ◽  
Shift Reagents ◽  
Kinetics Of ◽  
Alpha Amino Acid ◽  
Acid Esters

The basic hydrolysis of amino acid esters

1966 ◽  
Vol 19 (7) ◽  
pp. 1197 ◽  
Author(s):  
RW Hay ◽  
LJ Porter ◽  
PJ Morris
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Steric Effects ◽  
Ionization Constants ◽  
Amino Acid Esters ◽  
Kinetic Measurements ◽  
Basic Hydrolysis ◽  
Kinetics Of ◽  
Hydrolysis Of ◽  
Acid Esters

The kinetics of alkaline hydrolyses of nine amino acid esters by the process H,2NCHRCO2R'+OH- + H2NCHRCO2-+R'OH have been studied at 25� and an ionic strength of 0.1M in water over a range of pH. The acid ionization constants of the various amino acid esters have been determined, and these are roughly 2 pK units lower than those of the corresponding amino acids. The kinetic measurements are interpretable on the basis of electrostatic and steric effects.

ChemInform Abstract: A SYNTHESIS OF N-PHTHALOYL AMINO ACIDS AND AMINO ACID ESTERS UNDER MILD CONDITIONS

1973 ◽  
Vol 4 (40) ◽  
pp. no-no
Author(s):  
D. A. HOOGWATER ◽  
D. N. REINHOUDT ◽  
T. S. LIE ◽  
J. J. GUNNEWEG ◽  
H. C. BEYERMAN
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Amino Acid Esters ◽  
Mild Conditions ◽  
Acid Esters

Nickel-catalyzed carbodifunctionalization of N-vinylamides enables access to γ-amino acids

2020 ◽  
Vol 56 (17) ◽  
pp. 2642-2645 ◽  
Author(s):  
Zhi-Fang Yang ◽  
Chang Xu ◽  
Xing Zheng ◽  
Xingang Zhang
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Tandem Reaction ◽  
Amino Acid Esters ◽  
Arylboronic Acids ◽  
Acid Esters

A nickel-catalyzed tandem reaction of N-vinylamides with arylboronic acids and bromodifluoroacetate has been developed. The reaction efficiently furnishes a series of protected α,α-difluoro-γ-amino acid esters.

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